Superheater for locomotives.



O. W. OTT.

SUPERHEATER FOR LOCOMOTIVES. APPLICATION FILED APR.8, 1907. RENEWED AUG. 21, 1909,

Patented Sept. 28, 1909. 2 SHEETS-SHEET 1.

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O. W. OTT.

SUPERHEATER FOR LOCOMOTIVES. APPLIGATION FILED APR. 8, 1907. RENEWED AUG. 21

Patented Sept. 28, 1909. 2 SHEETS-SHEET 2.

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and inclosing part of the flues.

UNITED STATES PATENT OFFICE.

ORAN W. OTT, OF OAK'PARK, ILLINOIS.

SUPERHEATER FOR LOCOMOTIVES.

Specification of Letters Patent.

Patented Sept. 28,- 1909.

Application filed April 8, 1907, Serial No. 366,964.. Renewed August 21, 1909. Serial No. 514,054.

To all whom it may concern:

Be it known that I, ORAN W. O'r'r, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Superheatersfor Locomotives, of which the following is a specification. The object of my invention is to provide means to be used in connection with locomotive or other lire tube boilersfor superheating steam. v

' The precise nature of my invention will more clearly appear from the following description and claims.

In the drawings-Figure l is a longitudinal section of a locomotive boiler equipped with my invention. Fig. 2 is a longitudinal sectional view of the superheating device; and Fig. 3 is a transverse section of the boiler and superheater.

For the purposeof superheating the steam I utilize a certain number of the flues, jacketing such flues throughout their length. The superheater consists of a chamber extending throughout the length of the boiler the usual steam dome is conducted to the superheating chamber and after traversing the same is led to a second steam dome in which the throttle valve is placed.

I have shown my invention applied to a locomotive boiler A of a common type. Extending between the flue sheets B and G are the usual flues D. Also extending between the flue sheets and secured thereto is the su-- perheater E, preferably cylindrical in form and inclosing as many of the flues as may be necessary for the purpose intended. In side of the superheating chamber or drum E is a shell F preferably cylindrical in form. The shell F is shorter than the superheating chamber E and communicates therewith through its ends which are open. At one end the shell F is connected to the walls of the superheating chamber E by any suitable means such as the partition ring G, shown in Fig. 2 of the drawings. The shell Fincloses part of the flues in the superheating chamber E, the remainder of said flues extending through the annular space between the shell F and the wall E of the superheating chamber. The flues outside of the shell F pass through apertures in the partition ring G. A pipe H leads from the steam dome I and communicates with the super- Steam from heater through aperture K, adjacent to the partition G. A pipe L is connected to the superheating chamber E on the opposite side of the ring G and leads to a second steam dome M designed to receive the superheated steamsuperheated steam is con-' ducted from the dome M through pipes N to the cylinders in the usual manne'ijnfi The throttle valve 0 is located in the pipe N at a point inside of the steam, dome M.- The drum is preferably constructed iIl'llWO sections-united by a joint S which is designed to permit a slight degree of expansion.

()n reference to the drawings it will be observed that I have shown my invention embodied in a locomotive boiler of standard type having a crownsheet above the firebox flue sheet. As a result of this construction all the fines are below the crown sheet and inasmuch as the crown sheet is always covered with water, all the fiues are under water. The drum E which surrounds part of this flue for superheating purposes: is therefore entirely immersed in water.

In operation steam will flow from the dome I through the pipe H into the superheater E, thence through the space between the outside wall of the superheater and the shell F and back througl'i'the inside of the shell F to the dome M. The effectual superheating of the steam ispromoted by the shell F, which compels the steam to traverse the length of the superheating chamber twice, and with the outside wall of the superheater forms a steam jacket around the superheated steam during the .latter part of its progress through-the superheater. The steam upon its first entry into the superheater and during its passage through the space between its internal shell F and the outer wall E of the super-heater is jacketed by the water in the boiler. Upon its return passage, however, through the interior of the shell F, the steam is jacketed by incoming steam inclosed in the space between the shell F andthe wall E, thus insuring more effectual superheating.

In order to prevent the possibility of an injurious action upon the fines in the superheater when the latter is not-in use, I have provided a damper P adapted to cover the forward ends of said flues Any suitable means may be provided for holding said damper in open'position during the operafrom theforegoing, is simple in construction and its design is such that .therearea minimum number of joints between the super-.

heater and the fiues and other parts of the boiler. Furthermore' the arrangement of the steamdomes and throttle is such that the pressure upon opposite sides of the, walls of the superheater' is always balanced whether steam is being used or, not, thus reducingto a minimum the tendency to leakage through the joints. v

I claim:

' 1'. In an apparatus ofthe class described a boiler comprising p'art'of said flues throughout their-length,

said drum being entirely comprehended be-: tween the flue sheets, a steamdome connected to said boiler, a second steam dome connected.

to said drum, and a throttle valve in said second steamzdo'me; f 3. Inan apparatus of the class described a boiler .comp'rlsing flues, a drum inclosing part of said flues throughout their length,

a shell open at both ends inclosing part of steam dome.

the flues in; said said I shell having a flanged connection adj acent one end with the drum, a steam doniejon saidiboilen'a-pipe I leading from said do: e and communicating with said drum on one de of saidconnection,

a second steam some, andap1pe leading nection and communicating with said second '4. In an apparatus of-the class described, a

-v boiler comprising two flue sheets, fiues ex-" tending between. said sheets, a drum surfrom said drum on the other sideof said con rounding ,a. plurality of. flues throughout their length and having its ends attached respectively to the said flue sheets on the inner sides thereof, inlet and outlet openings for steam in the wall of the drum, said openings-both being near one end of'the drum, an

annular partitlon between ,s-aid openings and:

a tubular extension from the inner edge,

thereof towafd the opposite end of the drum.

5.} In an apparatus of the class described, a boiler comprlsing asuperheating chamber within the boiler shell and between the flue "sheets thereof, two-domes on the boiler, one

of them being separated by a partition from other dome to the superheating chamber, an-

,other pipe from the superheating chamber to "the partitioned dome, and a throttle valve in r said partitioned dome.

ORAN w. o'TT; Witnesses: I p NORMAN A. STREET,

W. T. J ONES.

the boiler space, a pipe leading from the 

